DE60254C - Weighing rats with trough-shaped sieves swinging around their longitudinal axis - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

CLASS 1: Processing of ores.

Patented in the German Empire on February 4, 1891.

The purpose of the lullaby shown in the accompanying drawing is the separation τοπ ores, coals etc. in several sorts of different grain sizes.

The device essentially consists of several sheet metal bodies A (four in the drawing), which may be called "cradles" here, and each of which contains a curved sieve α (section of a cylinder jacket).

These cradles are suspended by tie rods b on the lever arms c of a common horizontal shaft d which. can be set in a swinging (balancing) movement by a further lever arm e and a crank f connected to it by means of a handlebar. If the crankshaft g is now driven by a pulley or in some other way, the cradles swing, the suspension points of which are arranged in such a way that both the sieve and the whole body of each individual cradle rotate about an inclined line lying in the deepest part of the sieve.

The position of the sieves in their end positions (at the highest or lowest position of the crank) can be seen from FIGS. 4 and 5.

If you now lead from the upper one while moving the cradles hanging one behind the other At the end of the same through any feed device screened material, this is with the Seven lifted alternately to the right and left, sliding each time from the steeper one inclined part of the sieve to the other, more horizontal side, whereby a very perfect sieving must occur.

The fine screen falls into the sickle-shaped space h below the screen, which is formed by a dense sheet metal base /. As a result of the longitudinal inclination of the cradles, the material to be screened also moves forward with each stroke until it reaches the lower end of the cradle; Here the coarse sieve is discharged through a lateral opening i , while the fine sieve is passed through a transfer channel k into the next cradle provided with a finer sieve. In this way the largest part of the material to be sieved is separated out in each cradle, and any number of types of grain can be produced by increasing the cradles.

The sieves are fastened in the cradles in such a way that they can be easily removed at any time and can be replaced by others. Perforated sheets can easily be used for the coarser sieves , finer sieves must have a correspondingly shaped frame.

The novelty and peculiarity of this sieving device (the weighing riddle) exists partly in the use of curved screens with an otherwise older-like arrangement, partly in the particular type of suspension and movement of the sieves through which both a good sieving effect, with efficient separation of the coarsest parts, as well as one Forward movement of the masses and a direct transfer to the next sieve is achieved.

Compared to the drum sieves, the Wiegenrätter offers, apart from the one already mentioned more rational type of sieving, the advantage of clarity and that of the

significantly greater performance, because the cradles can be moved very quickly, while the drums rotated very slowly to use a centrifugal effect may be.

Of very essential importance is the fact that all parts of the cradle counselor can be exchanged with ease and in a very short time.

Compared to the otherwise known rats, the Wiegenrä'tter offers the advantage of a verbältnifsmäfsig low power requirement, also that of the very simple and therefore cheap type of installation BEZW. suspension and avoiding all bumps.

In comparison with the actual vibrating rattles (according to the inventor) the Weighing rats also undoubtedly cause a far better sieving.

With regard to the suspension of the cradle, it should also be noted that in the Drawing for this purpose, however, a framework is indicated, but that the latter is in Use of the Rätters in buildings is mostly dispensable by using both the Lever shaft as well as the drive (crank) shaft in hangers under the next Can attach joists.

Claims (1)

Patent claim: A weighing riddle consisting of a number of sieves for the classification of coals, ores and other granular substances, characterized in that the individual sieves α , which are provided with a lateral discharge channel, and the sheet metal bases firmly connected to these sieves, are given a trough-like shape, while the sieves even, which are suspended one behind the other by means of tie rods on single or double-armed swinging levers, make vertical oscillations about their longitudinal axis. For this purpose ι sheet of drawings.